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<tr><th colspan="5" align="center" valign="bottom">PostgreSQL 8.2.3 中文文档</th></tr>
<tr><td width="10%" align="left" valign="top"><a href="catalog-pg-am.html" accesskey="P">后退</a></td><td width="10%" align="left" valign="top"><a href="catalogs.html">快退</a></td><td width="60%" align="center" valign="bottom">章43. 系统表</td><td width="10%" align="right" valign="top"><a href="catalogs.html">快进</a></td><td width="10%" align="right" valign="top"><a href="catalog-pg-amproc.html" accesskey="N">前进</a></td></tr>
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<div class="SECT1"><h1 class="SECT1"><a name="CATALOG-PG-AMOP">43.4. <tt class="STRUCTNAME">pg_amop</tt></a></h1><a name="AEN62091"></a>
<p><tt class="STRUCTNAME">pg_amop</tt> 表存储有关和索引访问方法操作符类关联的信息。如果一个操作符是一个操作符类中的成员，那么在这个表中会占据一行。</p>
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<p><b>表43-4. <tt class="STRUCTNAME">pg_amop</tt> 字段</b></p>
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<tr><td><tt class="STRUCTFIELD">amopclaid</tt></td><td><tt class="TYPE">oid</tt></td><td><tt class="LITERAL"><a href="catalog-pg-opclass.html"><tt class="STRUCTNAME">pg_opclass</tt></a>.oid</tt></td><td>这条记录表示的索引操作符类</td></tr>
<tr><td><tt class="STRUCTFIELD">amopsubtype</tt></td><td><tt class="TYPE">oid</tt></td><td><tt class="LITERAL"><a href="catalog-pg-type.html"><tt class="STRUCTNAME">pg_type</tt></a>.oid</tt></td><td>区分一个策略的多条记录的子类型，缺省为零</td></tr>
<tr><td><tt class="STRUCTFIELD">amopstrategy</tt></td><td><tt class="TYPE">int2</tt></td><td>&nbsp;</td><td>操作符策略数</td></tr>
<tr><td><tt class="STRUCTFIELD">amopreqcheck</tt></td><td><tt class="TYPE">bool</tt></td><td>&nbsp;</td><td>索引命中必须重新检查</td></tr>
<tr><td><tt class="STRUCTFIELD">amopopr</tt></td><td><tt class="TYPE">oid</tt></td><td><tt class="LITERAL"><a href="catalog-pg-operator.html"><tt class="STRUCTNAME">pg_operator</tt></a>.oid</tt></td><td>该操作符的 OID</td></tr>
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<tr><td width="33%" align="left" valign="top"><a href="catalog-pg-am.html" accesskey="P">后退</a></td><td width="34%" align="center" valign="top"><a href="index.html" accesskey="H">首页</a></td><td width="33%" align="right" valign="top"><a href="catalog-pg-amproc.html" accesskey="N">前进</a></td></tr>
<tr><td width="33%" align="left" valign="top"><tt class="STRUCTNAME">pg_am</tt></td><td width="34%" align="center" valign="top"><a href="catalogs.html" accesskey="U">上一级</a></td><td width="33%" align="right" valign="top"><tt class="STRUCTNAME">pg_amproc</tt></td></tr>
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